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    GCF (HCF) of 64 and 80

    "Greatest Common Factor" Calculator
    Greatest Common Factor of
    and

    What is the Greatest Common Divisor of 64 and 80?

    Answer

    GCF (HCF) of 64 and 80 is
    16

    Common factors: 1, 2, 4, 8, 16

    16 divides both: 64 ÷ 16 = 4, 80 ÷ 16 = 5 — and 4 and 5 share no factor but 1, so no larger number divides both.

    64 = 26

    80 = 24 × 5

    Prime6480Lowest power
    2262424
    5—5—

    — = power 0: the prime is not a factor of this number, so it cannot be in the GCF.

    GCF = 24 = 16

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    What is the GCF (HCF) of 64 and 80. The GCF of 64 and 80 is 16 — the biggest number that can divide both integers. Step-by-step GCF (GCD) calculation by factoring.
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    GCF Table

    Number 1Number 2GCF
    64651
    64662
    64671
    64684
    64691
    64702
    64711
    64728
    64731
    64742
    64751
    64764
    64771
    64782
    64791
    648016
    64811
    64822
    64831
    64844
    64851
    64862
    64871
    64888
    64891
    64902
    64911
    64924
    64931
    64942

    FAQ

    What is the Greatest Common Divisor of 64 and 80?

    GCF (HCF) of 64 and 80 is 16

    How to find the GCF of 64 and 80?

    You can find the GCF of 64 and 80 by listing all factors of both numbers and picking the greatest common one, or by prime factorization. The GCF of 64 and 80 is 16.

    What prime factors do 64 and 80 share?

    The prime factorizations of 64 and 80 have 2 × 2 × 2 × 2 in common, and multiplying those shared primes gives 16 — exactly the greatest common factor.

    How does the GCF reduce the fraction 64/80?

    Divide the numerator and the denominator by the GCF 16: 64 ÷ 16 = 4 and 80 ÷ 16 = 5. So 64/80 in lowest terms is 4/5.

    See Also